Keysight x-series Instruction Manual

3 Short-Range Comms & IoT Mode
3.2 Modulation Analysis Measurement
Condition n Return Value
Modulation
Format = Offset
QPSK
9 IQ Ref Spectrum – returns the spectrum of the IQ reference time
trace
Modulation
Format = 2 FSK
9 FSK Ref Spectrum – returns the spectrum of the reference time
trace
Modulation
Format = Offset
QPSK
10 Error Vector Time – returns a series of floating point numbers (in
percent) that represent each sample in the EVM trace. The first
number is the symbol 0 decision point. There are X points per
symbol (X=points/symbol). Therefore, the decision points are at
0, 1*X, 2*X, … and so on
Modulation
Format = 2 FSK
10 FSK Error Time – returns a series of floating point numbers (in
percent) that represent each sample in the FSK Error Time trace
11 EVM Spectrum – returns the spectrum of the error vector time
trace
Modulation
Format = 2 FSK
11 FSK Error Spectrum – returns the spectrum of the FSK Error
Time trace
Modulation
Format = Offset
QPSK
12 Magnitude Error – returns a series of floating point numbers (in
percent) that represent each sample in the magnitude error
trace. The first number is the symbol 0 decision point. There are
X points per symbol (X=points/symbol). Therefore, the decision
points are at 0, 1*X, 2*X, …
Modulation
Format = 2 FSK
12 Carrier Mag Error – returns a series of floating point numbers (in
percent) that represent each sample in the Carrier Magnitude
Error trace
Modulation
Format = Offset
QPSK
13 Phase Error – returns a series of floating point numbers (in
percent) that represent each sample in the phase error trace.
The first number is the symbol 0 decision point. There are X
points per symbol (X=points/symbol). Therefore, the decision
points are at 0, 1*X, 2*X, …
Modulation
Format = 2 FSK
13 Reserved
14 CH Freq Response (Amptd) – returns the amplitude trace of the
channel frequency response trace
15 CH Freq Response (Phase) – returns the phase trace of the
channel frequency response trace
16 CH Freq Response (Group Delay) – returns the group delay trace
of the channel frequency response trace
17 Equalizer impulse response trace – returns a series of floating
point numbers (in dB) that represent each sample in the
equalizer’s impulse response trace
18 Demod bits – returns the demodulation bits
19 Decode bits – returns the decoded bits
Short Range Comms & IoT Mode User's &Programmer's Reference 187

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)